求下列各式中的x:(1) x²-7=0 (2)3(x-5)³=-375 (3) 9(x-3)²=64
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![求下列各式中的x:(1) x²-7=0 (2)3(x-5)³=-375 (3) 9(x-3)²=64](/uploads/image/z/1024260-60-0.jpg?t=%E6%B1%82%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E4%B8%AD%E7%9A%84x%EF%BC%9A%EF%BC%881%EF%BC%89+x%26%23178%3B-7%3D0+%EF%BC%882%EF%BC%893%EF%BC%88x-5%EF%BC%89%26%23179%3B%3D-375+%EF%BC%883%EF%BC%89+9%EF%BC%88x-3%EF%BC%89%26%23178%3B%3D64)
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求下列各式中的x:(1) x²-7=0 (2)3(x-5)³=-375 (3) 9(x-3)²=64
求下列各式中的x:(1) x²-7=0 (2)3(x-5)³=-375 (3) 9(x-3)²=64
求下列各式中的x:(1) x²-7=0 (2)3(x-5)³=-375 (3) 9(x-3)²=64
(1)x=7 (2)(x-5)³=-125 (3)(x-3)²=64/9
x1=√7,x2=-√7 x-5=-5 x-3=+-8/3
x=0 x1=17/3,x2=1/3